Michelle Bergquist
Librarian gone Web Dev.
RESTful Design
Learning Objectives
By the end of this lesson, you will be able to:
- Describe what REST is and why it is important
- List the 5 HTTP verbs used in RESTful development
- Describe the HTTP methods supported by the browser
- List the CRUD RESTful routes
- Discuss CRUDL and relate it to REST concepts
- Explain how to do a PUT request in Express
- Contrast Idempotent and Safe
What is REST?
5
What are the 5 constraints of REST?
REST
REpresentational State Transfer
REST is an architectural style of APIs, where the focus is on a specific set of interactions between the client and server, rather than implementation details.
Its purpose is to induce performance, scalability, simplicity, modifiability, visibility, portability, and reliability.
5 Constraints
- Client-Server - assume a disconnected, decoupled system
- Stateless - A request cannot be dependent on a past request and a service treats each request independently. HTTP is a stateless protocol by design.
- Cacheable - assume that data received can be cached and relied upon
- Uniform interface - 4 additional constraints
- Layered System - Client can't assume a direct connection with the database
What HTTP verbs...
3
... are used in RESTFUL services
5 RESTful HTTP verbs
GET
POST
PUT
PATCH
DELETE
HTTP verbs- the Browser
HTML Forms: 'method'
- Post
- Get
JavaScript:
- All
HTTP, Browser & REST
How do we do a put/patch/delete?
NPM Method-Override
https://www.npmjs.com/package/method-override
What are the 5 ...
3
... RESTful CRUD routes?
5 RESTful CRUD routes
LIST
app.get('/')
READ
app.get('/:id')
CREATE
app.post('/')
UPDATE
app.patch('/:id')
app.put('/:id')
DELETE
app.delete('/:id')
Status Codes
LIST
app.get('/') : 200
READ
app.get('/:id') : 200
CREATE
app.post('/') : 201
UPDATE
app.patch('/:id') : 200
app.put('/:id') : 200
DELETE
app.delete('/:id') : 204
Idempotent
Idempotent - A HTTP method that can be called many times without different outcomes.
Safe - A HTTP methods that do not modify resources
Learning Objectives
By the end of this lesson, you will be able to:
- Describe what REST is and why it is important
- List the 5 HTTP verbs used in RESTful development
- Describe the HTTP methods supported by the browser
- Discuss CRUDL and relate it to REST concept
- List the CRUD RESTful routes
- Explain how to do a PUT request in Express
- Contrast Idempotent and Safe
Resources
64-intro-REST
By Michelle Bergquist
64-intro-REST
Supplemental deck for a galvanize lesson
